NDLI: Sliding seal materials for adiabatic engines

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Sliding seal materials for adiabatic engines

Content Provider	NASA Technical Reports Server (NTRS)
Author	Lankford, J.
Copyright Year	1985
Description	The sliding friction coefficients and wear rates of promising carbide, oxide, and nitride materials were measured under temperature, environmental, velocity, loading conditions that are representative of the adiabatic engine environment. In order to provide guidance needed to improve materials for this application, the program stressed fundamental understanding of the mechanisms involved in friction and wear. Microhardness tests were performed on the candidate materials at elevated temperatures, and in atmospheres relevant to the piston seal application, and optical and electron microscopy were used to elucidate the micromechanisms of wear following wear testing. X-ray spectroscopy was used to evaluate interface/environment interactions which seemed to be important in the friction and wear process. Electrical effects in the friction and wear processes were explored in order to evaluate the potential usefulness of such effects in modifying the friction and wear rates in service. However, this factor was found to be of negligible significance in controlling friction and wear.
File Size	23920231
Page Count	70
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850014446
Archival Resource Key	ark:/13960/t1tf4pc16
Language	English
Publisher Date	1985-04-01
Access Restriction	Open
Subject Keyword	Nonmetallic Materials X Ray Spectroscopy Oxides Ceramics Coefficients Microhardness Pistons Seals Stoppers Nitrides Rates Per Time Diesel Engines Wear Adiabatic Conditions Wear Tests Carbides Sliding Friction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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